The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 2010
Filed:
Jan. 29, 2009
Applicants:
Liu Yu, Kawasaki, JP;
Masato Yoshioka, Kawasaki, JP;
Inventors:
Liu Yu, Kawasaki, JP;
Masato Yoshioka, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01);
U.S. Cl.
CPC ...
Abstract
An amplifier circuit includes a pair of transistors amplifying differential signals of input signals to respective input terminals and outputting differential output signals to respective output terminals, and an impedance circuit provided in between sources of the pair of transistors, canceling a first cutoff characteristic on a high frequency side in frequency characteristics of the amplifier circuit constructed of the pair of transistors, and forming a second cutoff characteristic on a higher frequency side than the first cutoff characteristic.